The late Ms. Lansbury did a lot of radio and TV; here are five examples of her radio work, from a 1947 Suspense episode to a 1952 Stars Over Hollywood. There are a few more in Archive's OTR section but these are enough to show her range as an actress.
And don't forget to donate what you can to Internet Archive -- $3 or more will keep them on the net. We of the poverty-stricken set salute you.
Suspense May 29 1947 = A Thing of Beauty
NBC U Theater Nov 18 1948 - Of Human Bondage
MGM Theatre - July 14, 1950 - Stamboul Quest
Proudly We Hail - House on Lakewood Dr - 48-07-18
Stars Over Hollywood - 52-05-24 - The Experiment
Sources:
https://radiogoldin.library.umkc.edu/Home/RadioGoldin_Records?searchString=Lansbury,%20Angela&type=Artists&count=19
https://commons.wikimedia.org/wiki/File:Angela_Lansbury_1966.jpg